Fix missing version for tags

Apply containerd patch 3889

Cleanup k8s versioning

Kine fix

Small dqlite fixes

Upgrade k8s  to v1.17.0

Set Wireguard keepalive to 25 seconds

Remove docker-compose default token

Cleanup docker-compose.yml

Enable ip forwarding on both all and default net config

Allow --pause-image to set docker sandbox image also

Cleanup --flannel-backend help text

Upgrade go to 1.13.5

Mutable --node-label values for server/agent sub-commands.

For #577

The Linux kernel is inconsistent about how devconf is configured for new
network namespaces between ipv4 and ipv6. The behavior can also be
controlled via net.core.devconf_inherit_init_net in Linux 5.1+ so make
sure to enable forwarding on all and default for both ipv6 and ipv4.

This issue first came up testing on a yocto kernel that had this patch:
 ipv4: net namespace does not inherit network configurations

[0] https://www.kernel.org/doc/html/latest/admin-guide/sysctl/net.html#devconf-inherit-init-net
[1] https://lkml.org/lkml/2014/7/29/119

Signed-off-by: Brennan Ashton <brennana@jfrog.com>

Update README.md: k3s does not exclude legacy/alpha/non-default features anymore

Values passed in via the server/agent `--node-label` flag are treated as mutable. They are passed through to the kubelet just as before but after the kubelet comes up they are applied again. This allows for passing labels a k3s start-time that may be necessary for scheduling but may change from boot to boot, e.g. `k3os.io/version` after an upgrade.

Tested locallon on my amd64 workstation with the docker container.

Addresses #1119.

In the past, yes k3s did exclude all those legacy, alpha, non-default
features from Kubernetes source as you can see in
https://github.com/rancher/k3s/pull/113. But not anymore.

As you can see in the source code, most of legacy/alpha/non-default
features is available in k3s, and misleading README should be updated.

But please, don't get me wrong. I'm actually glad to see those features
enabled in k3s. :)

Reference:
  https://github.com/kubernetes/kubernetes/compare/v1.16.3...rancher:v1.16.3-k3s.1

Code cleanup

Bump dqlite to support arm 32-bit